fix: improve 'ai-tools' module (host-specific options)

home/hosts/andromache/default.nix

@@ -40,6 +40,7 @@ in
   xdg.userDirs.createDirectories = false;
   xdg.userDirs.download = "${config.home.homeDirectory}/dl";
 
+  ai-tools.opencode.enable = true;
   browser.primary = "librewolf";
   cloud.hetzner.enable = true;
   comms.signal.enable = true;

home/hosts/astyanax/default.nix

@@ -37,6 +37,7 @@ in
   xdg.userDirs.createDirectories = false;
   xdg.userDirs.download = "${config.home.homeDirectory}/dl";
 
+  ai-tools.opencode.enable = true;
   browser.primary = "librewolf";
   cloud.hetzner.enable = true;
   comms.signal.enable = true;

home/hosts/work/default.nix

@@ -70,6 +70,7 @@ in
   cloud.azure.enable = true;
   comms.signal.enable = true;
   comms.teams.enable = true;
+  ai-tools.claude-code.enable = true;
   github.enable = true;
   gitlab.enable = true;
 

home/modules/ai-tools.nix

@@ -1,11 +1,23 @@
 {
+  lib,
+  config,
   pkgs,
   ...
 }:
+let
+  cfg = config.ai-tools;
+  rtk-version = "0.18.1";
+in
 {
-  config = {
+  options.ai-tools = {
+    claude-code.enable = lib.mkEnableOption "claude code with rtk and ccline";
+    opencode.enable = lib.mkEnableOption "opencode";
+  };
+
+  config = lib.mkMerge [
+    (lib.mkIf cfg.claude-code.enable {
       home.packages = with pkgs; [
-      aider-chat
+        claude-code
         (pkgs.stdenv.mkDerivation {
           name = "ccline";
           src = pkgs.fetchurl {
@@ -30,11 +42,38 @@
             platforms = [ "x86_64-linux" ];
           };
         })
-      # claude-code
-      # (config.lib.nixGL.wrap code-cursor)
-      # github-copilot-cli
+        (pkgs.stdenv.mkDerivation {
+          name = "rtk-${rtk-version}";
+          version = rtk-version;
+          src = pkgs.fetchurl {
+            url = "https://github.com/rtk-ai/rtk/releases/download/v${rtk-version}/rtk-x86_64-unknown-linux-gnu.tar.gz";
+            hash = "sha256-XoTia5K8b00OzcKYCufwx8ApkAS31DxUCpGSU0jFs2Q=";
+          };
+
+          unpackPhase = ''
+            tar xzf $src
+          '';
+
+          installPhase = ''
+            mkdir -p $out/bin
+            cp rtk $out/bin/
+            chmod +x $out/bin/rtk
+          '';
+
+          meta = with pkgs.lib; {
+            description = "RTK - AI coding tool enhancer";
+            homepage = "https://www.rtk-ai.app";
+            license = licenses.mit;
+            platforms = [ "x86_64-linux" ];
+          };
+        })
         mcp-nixos
+      ];
+    })
+    (lib.mkIf cfg.opencode.enable {
+      home.packages = with pkgs; [
         opencode
       ];
-  };
+    })
+  ];
 }